2 * Support PCI/PCIe on PowerNV platforms
4 * Copyright 2011 Benjamin Herrenschmidt, IBM Corp.
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
14 #include <linux/kernel.h>
15 #include <linux/pci.h>
16 #include <linux/debugfs.h>
17 #include <linux/delay.h>
18 #include <linux/string.h>
19 #include <linux/init.h>
20 #include <linux/bootmem.h>
21 #include <linux/irq.h>
23 #include <linux/msi.h>
25 #include <asm/sections.h>
28 #include <asm/pci-bridge.h>
29 #include <asm/machdep.h>
30 #include <asm/msi_bitmap.h>
31 #include <asm/ppc-pci.h>
33 #include <asm/iommu.h>
36 #include <asm/debug.h>
41 #define define_pe_printk_level(func, kern_level) \
42 static int func(const struct pnv_ioda_pe *pe, const char *fmt, ...) \
44 struct va_format vaf; \
49 va_start(args, fmt); \
55 strlcpy(pfix, dev_name(&pe->pdev->dev), \
58 sprintf(pfix, "%04x:%02x ", \
59 pci_domain_nr(pe->pbus), \
61 r = printk(kern_level "pci %s: [PE# %.3d] %pV", \
62 pfix, pe->pe_number, &vaf); \
69 define_pe_printk_level(pe_err, KERN_ERR);
70 define_pe_printk_level(pe_warn, KERN_WARNING);
71 define_pe_printk_level(pe_info, KERN_INFO);
73 static int pnv_ioda_alloc_pe(struct pnv_phb *phb)
78 pe = find_next_zero_bit(phb->ioda.pe_alloc,
79 phb->ioda.total_pe, 0);
80 if (pe >= phb->ioda.total_pe)
81 return IODA_INVALID_PE;
82 } while(test_and_set_bit(pe, phb->ioda.pe_alloc));
84 phb->ioda.pe_array[pe].phb = phb;
85 phb->ioda.pe_array[pe].pe_number = pe;
89 static void pnv_ioda_free_pe(struct pnv_phb *phb, int pe)
91 WARN_ON(phb->ioda.pe_array[pe].pdev);
93 memset(&phb->ioda.pe_array[pe], 0, sizeof(struct pnv_ioda_pe));
94 clear_bit(pe, phb->ioda.pe_alloc);
97 /* Currently those 2 are only used when MSIs are enabled, this will change
98 * but in the meantime, we need to protect them to avoid warnings
100 #ifdef CONFIG_PCI_MSI
101 static struct pnv_ioda_pe *pnv_ioda_get_pe(struct pci_dev *dev)
103 struct pci_controller *hose = pci_bus_to_host(dev->bus);
104 struct pnv_phb *phb = hose->private_data;
105 struct pci_dn *pdn = pci_get_pdn(dev);
109 if (pdn->pe_number == IODA_INVALID_PE)
111 return &phb->ioda.pe_array[pdn->pe_number];
113 #endif /* CONFIG_PCI_MSI */
115 static int pnv_ioda_configure_pe(struct pnv_phb *phb, struct pnv_ioda_pe *pe)
117 struct pci_dev *parent;
118 uint8_t bcomp, dcomp, fcomp;
119 long rc, rid_end, rid;
121 /* Bus validation ? */
125 dcomp = OPAL_IGNORE_RID_DEVICE_NUMBER;
126 fcomp = OPAL_IGNORE_RID_FUNCTION_NUMBER;
127 parent = pe->pbus->self;
128 if (pe->flags & PNV_IODA_PE_BUS_ALL)
129 count = pe->pbus->busn_res.end - pe->pbus->busn_res.start + 1;
134 case 1: bcomp = OpalPciBusAll; break;
135 case 2: bcomp = OpalPciBus7Bits; break;
136 case 4: bcomp = OpalPciBus6Bits; break;
137 case 8: bcomp = OpalPciBus5Bits; break;
138 case 16: bcomp = OpalPciBus4Bits; break;
139 case 32: bcomp = OpalPciBus3Bits; break;
141 pr_err("%s: Number of subordinate busses %d"
143 pci_name(pe->pbus->self), count);
144 /* Do an exact match only */
145 bcomp = OpalPciBusAll;
147 rid_end = pe->rid + (count << 8);
149 parent = pe->pdev->bus->self;
150 bcomp = OpalPciBusAll;
151 dcomp = OPAL_COMPARE_RID_DEVICE_NUMBER;
152 fcomp = OPAL_COMPARE_RID_FUNCTION_NUMBER;
153 rid_end = pe->rid + 1;
156 /* Associate PE in PELT */
157 rc = opal_pci_set_pe(phb->opal_id, pe->pe_number, pe->rid,
158 bcomp, dcomp, fcomp, OPAL_MAP_PE);
160 pe_err(pe, "OPAL error %ld trying to setup PELT table\n", rc);
163 opal_pci_eeh_freeze_clear(phb->opal_id, pe->pe_number,
164 OPAL_EEH_ACTION_CLEAR_FREEZE_ALL);
166 /* Add to all parents PELT-V */
168 struct pci_dn *pdn = pci_get_pdn(parent);
169 if (pdn && pdn->pe_number != IODA_INVALID_PE) {
170 rc = opal_pci_set_peltv(phb->opal_id, pdn->pe_number,
171 pe->pe_number, OPAL_ADD_PE_TO_DOMAIN);
172 /* XXX What to do in case of error ? */
174 parent = parent->bus->self;
176 /* Setup reverse map */
177 for (rid = pe->rid; rid < rid_end; rid++)
178 phb->ioda.pe_rmap[rid] = pe->pe_number;
180 /* Setup one MVTs on IODA1 */
181 if (phb->type == PNV_PHB_IODA1) {
182 pe->mve_number = pe->pe_number;
183 rc = opal_pci_set_mve(phb->opal_id, pe->mve_number,
186 pe_err(pe, "OPAL error %ld setting up MVE %d\n",
190 rc = opal_pci_set_mve_enable(phb->opal_id,
191 pe->mve_number, OPAL_ENABLE_MVE);
193 pe_err(pe, "OPAL error %ld enabling MVE %d\n",
198 } else if (phb->type == PNV_PHB_IODA2)
204 static void pnv_ioda_link_pe_by_weight(struct pnv_phb *phb,
205 struct pnv_ioda_pe *pe)
207 struct pnv_ioda_pe *lpe;
209 list_for_each_entry(lpe, &phb->ioda.pe_dma_list, dma_link) {
210 if (lpe->dma_weight < pe->dma_weight) {
211 list_add_tail(&pe->dma_link, &lpe->dma_link);
215 list_add_tail(&pe->dma_link, &phb->ioda.pe_dma_list);
218 static unsigned int pnv_ioda_dma_weight(struct pci_dev *dev)
220 /* This is quite simplistic. The "base" weight of a device
221 * is 10. 0 means no DMA is to be accounted for it.
224 /* If it's a bridge, no DMA */
225 if (dev->hdr_type != PCI_HEADER_TYPE_NORMAL)
228 /* Reduce the weight of slow USB controllers */
229 if (dev->class == PCI_CLASS_SERIAL_USB_UHCI ||
230 dev->class == PCI_CLASS_SERIAL_USB_OHCI ||
231 dev->class == PCI_CLASS_SERIAL_USB_EHCI)
234 /* Increase the weight of RAID (includes Obsidian) */
235 if ((dev->class >> 8) == PCI_CLASS_STORAGE_RAID)
243 static struct pnv_ioda_pe *pnv_ioda_setup_dev_PE(struct pci_dev *dev)
245 struct pci_controller *hose = pci_bus_to_host(dev->bus);
246 struct pnv_phb *phb = hose->private_data;
247 struct pci_dn *pdn = pci_get_pdn(dev);
248 struct pnv_ioda_pe *pe;
252 pr_err("%s: Device tree node not associated properly\n",
256 if (pdn->pe_number != IODA_INVALID_PE)
259 /* PE#0 has been pre-set */
260 if (dev->bus->number == 0)
263 pe_num = pnv_ioda_alloc_pe(phb);
264 if (pe_num == IODA_INVALID_PE) {
265 pr_warning("%s: Not enough PE# available, disabling device\n",
270 /* NOTE: We get only one ref to the pci_dev for the pdn, not for the
271 * pointer in the PE data structure, both should be destroyed at the
272 * same time. However, this needs to be looked at more closely again
273 * once we actually start removing things (Hotplug, SR-IOV, ...)
275 * At some point we want to remove the PDN completely anyways
277 pe = &phb->ioda.pe_array[pe_num];
280 pdn->pe_number = pe_num;
285 pe->rid = dev->bus->number << 8 | pdn->devfn;
287 pe_info(pe, "Associated device to PE\n");
289 if (pnv_ioda_configure_pe(phb, pe)) {
290 /* XXX What do we do here ? */
292 pnv_ioda_free_pe(phb, pe_num);
293 pdn->pe_number = IODA_INVALID_PE;
299 /* Assign a DMA weight to the device */
300 pe->dma_weight = pnv_ioda_dma_weight(dev);
301 if (pe->dma_weight != 0) {
302 phb->ioda.dma_weight += pe->dma_weight;
303 phb->ioda.dma_pe_count++;
307 pnv_ioda_link_pe_by_weight(phb, pe);
311 #endif /* Useful for SRIOV case */
313 static void pnv_ioda_setup_same_PE(struct pci_bus *bus, struct pnv_ioda_pe *pe)
317 list_for_each_entry(dev, &bus->devices, bus_list) {
318 struct pci_dn *pdn = pci_get_pdn(dev);
321 pr_warn("%s: No device node associated with device !\n",
327 pdn->pe_number = pe->pe_number;
328 pe->dma_weight += pnv_ioda_dma_weight(dev);
329 if ((pe->flags & PNV_IODA_PE_BUS_ALL) && dev->subordinate)
330 pnv_ioda_setup_same_PE(dev->subordinate, pe);
335 * There're 2 types of PCI bus sensitive PEs: One that is compromised of
336 * single PCI bus. Another one that contains the primary PCI bus and its
337 * subordinate PCI devices and buses. The second type of PE is normally
338 * orgiriated by PCIe-to-PCI bridge or PLX switch downstream ports.
340 static void pnv_ioda_setup_bus_PE(struct pci_bus *bus, int all)
342 struct pci_controller *hose = pci_bus_to_host(bus);
343 struct pnv_phb *phb = hose->private_data;
344 struct pnv_ioda_pe *pe;
347 pe_num = pnv_ioda_alloc_pe(phb);
348 if (pe_num == IODA_INVALID_PE) {
349 pr_warning("%s: Not enough PE# available for PCI bus %04x:%02x\n",
350 __func__, pci_domain_nr(bus), bus->number);
354 pe = &phb->ioda.pe_array[pe_num];
355 pe->flags = (all ? PNV_IODA_PE_BUS_ALL : PNV_IODA_PE_BUS);
360 pe->rid = bus->busn_res.start << 8;
364 pe_info(pe, "Secondary bus %d..%d associated with PE#%d\n",
365 bus->busn_res.start, bus->busn_res.end, pe_num);
367 pe_info(pe, "Secondary bus %d associated with PE#%d\n",
368 bus->busn_res.start, pe_num);
370 if (pnv_ioda_configure_pe(phb, pe)) {
371 /* XXX What do we do here ? */
373 pnv_ioda_free_pe(phb, pe_num);
378 /* Associate it with all child devices */
379 pnv_ioda_setup_same_PE(bus, pe);
381 /* Put PE to the list */
382 list_add_tail(&pe->list, &phb->ioda.pe_list);
384 /* Account for one DMA PE if at least one DMA capable device exist
387 if (pe->dma_weight != 0) {
388 phb->ioda.dma_weight += pe->dma_weight;
389 phb->ioda.dma_pe_count++;
393 pnv_ioda_link_pe_by_weight(phb, pe);
396 static void pnv_ioda_setup_PEs(struct pci_bus *bus)
400 pnv_ioda_setup_bus_PE(bus, 0);
402 list_for_each_entry(dev, &bus->devices, bus_list) {
403 if (dev->subordinate) {
404 if (pci_pcie_type(dev) == PCI_EXP_TYPE_PCI_BRIDGE)
405 pnv_ioda_setup_bus_PE(dev->subordinate, 1);
407 pnv_ioda_setup_PEs(dev->subordinate);
413 * Configure PEs so that the downstream PCI buses and devices
414 * could have their associated PE#. Unfortunately, we didn't
415 * figure out the way to identify the PLX bridge yet. So we
416 * simply put the PCI bus and the subordinate behind the root
417 * port to PE# here. The game rule here is expected to be changed
418 * as soon as we can detected PLX bridge correctly.
420 static void pnv_pci_ioda_setup_PEs(void)
422 struct pci_controller *hose, *tmp;
424 list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
425 pnv_ioda_setup_PEs(hose->bus);
429 static void pnv_pci_ioda_dma_dev_setup(struct pnv_phb *phb, struct pci_dev *pdev)
431 struct pci_dn *pdn = pci_get_pdn(pdev);
432 struct pnv_ioda_pe *pe;
435 * The function can be called while the PE#
436 * hasn't been assigned. Do nothing for the
439 if (!pdn || pdn->pe_number == IODA_INVALID_PE)
442 pe = &phb->ioda.pe_array[pdn->pe_number];
443 set_iommu_table_base(&pdev->dev, &pe->tce32_table);
446 static void pnv_pci_ioda1_tce_invalidate(struct iommu_table *tbl,
447 u64 *startp, u64 *endp)
449 u64 __iomem *invalidate = (u64 __iomem *)tbl->it_index;
450 unsigned long start, end, inc;
452 start = __pa(startp);
455 /* BML uses this case for p6/p7/galaxy2: Shift addr and put in node */
460 start |= tbl->it_busno;
461 end |= tbl->it_busno;
462 } else if (tbl->it_type & TCE_PCI_SWINV_PAIR) {
463 /* p7ioc-style invalidation, 2 TCEs per write */
464 start |= (1ull << 63);
468 /* Default (older HW) */
472 end |= inc - 1; /* round up end to be different than start */
474 mb(); /* Ensure above stores are visible */
475 while (start <= end) {
476 __raw_writeq(start, invalidate);
481 * The iommu layer will do another mb() for us on build()
482 * and we don't care on free()
486 static void pnv_pci_ioda2_tce_invalidate(struct pnv_ioda_pe *pe,
487 struct iommu_table *tbl,
488 u64 *startp, u64 *endp)
490 unsigned long start, end, inc;
491 u64 __iomem *invalidate = (u64 __iomem *)tbl->it_index;
493 /* We'll invalidate DMA address in PE scope */
495 start |= (pe->pe_number & 0xFF);
498 /* Figure out the start, end and step */
499 inc = tbl->it_offset + (((u64)startp - tbl->it_base) / sizeof(u64));
500 start |= (inc << 12);
501 inc = tbl->it_offset + (((u64)endp - tbl->it_base) / sizeof(u64));
506 while (start <= end) {
507 __raw_writeq(start, invalidate);
512 void pnv_pci_ioda_tce_invalidate(struct iommu_table *tbl,
513 u64 *startp, u64 *endp)
515 struct pnv_ioda_pe *pe = container_of(tbl, struct pnv_ioda_pe,
517 struct pnv_phb *phb = pe->phb;
519 if (phb->type == PNV_PHB_IODA1)
520 pnv_pci_ioda1_tce_invalidate(tbl, startp, endp);
522 pnv_pci_ioda2_tce_invalidate(pe, tbl, startp, endp);
525 static void pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb,
526 struct pnv_ioda_pe *pe, unsigned int base,
530 struct page *tce_mem = NULL;
531 const __be64 *swinvp;
532 struct iommu_table *tbl;
537 /* 256M DMA window, 4K TCE pages, 8 bytes TCE */
538 #define TCE32_TABLE_SIZE ((0x10000000 / 0x1000) * 8)
540 /* XXX FIXME: Handle 64-bit only DMA devices */
541 /* XXX FIXME: Provide 64-bit DMA facilities & non-4K TCE tables etc.. */
542 /* XXX FIXME: Allocate multi-level tables on PHB3 */
544 /* We shouldn't already have a 32-bit DMA associated */
545 if (WARN_ON(pe->tce32_seg >= 0))
548 /* Grab a 32-bit TCE table */
549 pe->tce32_seg = base;
550 pe_info(pe, " Setting up 32-bit TCE table at %08x..%08x\n",
551 (base << 28), ((base + segs) << 28) - 1);
553 /* XXX Currently, we allocate one big contiguous table for the
554 * TCEs. We only really need one chunk per 256M of TCE space
555 * (ie per segment) but that's an optimization for later, it
556 * requires some added smarts with our get/put_tce implementation
558 tce_mem = alloc_pages_node(phb->hose->node, GFP_KERNEL,
559 get_order(TCE32_TABLE_SIZE * segs));
561 pe_err(pe, " Failed to allocate a 32-bit TCE memory\n");
564 addr = page_address(tce_mem);
565 memset(addr, 0, TCE32_TABLE_SIZE * segs);
568 for (i = 0; i < segs; i++) {
569 rc = opal_pci_map_pe_dma_window(phb->opal_id,
572 __pa(addr) + TCE32_TABLE_SIZE * i,
573 TCE32_TABLE_SIZE, 0x1000);
575 pe_err(pe, " Failed to configure 32-bit TCE table,"
581 /* Setup linux iommu table */
582 tbl = &pe->tce32_table;
583 pnv_pci_setup_iommu_table(tbl, addr, TCE32_TABLE_SIZE * segs,
586 /* OPAL variant of P7IOC SW invalidated TCEs */
587 swinvp = of_get_property(phb->hose->dn, "ibm,opal-tce-kill", NULL);
589 /* We need a couple more fields -- an address and a data
590 * to or. Since the bus is only printed out on table free
591 * errors, and on the first pass the data will be a relative
592 * bus number, print that out instead.
595 tbl->it_index = (unsigned long)ioremap(be64_to_cpup(swinvp), 8);
596 tbl->it_type = TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE |
599 iommu_init_table(tbl, phb->hose->node);
600 iommu_register_group(tbl, pci_domain_nr(pe->pbus), pe->pe_number);
604 /* XXX Failure: Try to fallback to 64-bit only ? */
605 if (pe->tce32_seg >= 0)
608 __free_pages(tce_mem, get_order(TCE32_TABLE_SIZE * segs));
611 static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb,
612 struct pnv_ioda_pe *pe)
614 struct page *tce_mem = NULL;
616 const __be64 *swinvp;
617 struct iommu_table *tbl;
618 unsigned int tce_table_size, end;
621 /* We shouldn't already have a 32-bit DMA associated */
622 if (WARN_ON(pe->tce32_seg >= 0))
625 /* The PE will reserve all possible 32-bits space */
627 end = (1 << ilog2(phb->ioda.m32_pci_base));
628 tce_table_size = (end / 0x1000) * 8;
629 pe_info(pe, "Setting up 32-bit TCE table at 0..%08x\n",
632 /* Allocate TCE table */
633 tce_mem = alloc_pages_node(phb->hose->node, GFP_KERNEL,
634 get_order(tce_table_size));
636 pe_err(pe, "Failed to allocate a 32-bit TCE memory\n");
639 addr = page_address(tce_mem);
640 memset(addr, 0, tce_table_size);
643 * Map TCE table through TVT. The TVE index is the PE number
644 * shifted by 1 bit for 32-bits DMA space.
646 rc = opal_pci_map_pe_dma_window(phb->opal_id, pe->pe_number,
647 pe->pe_number << 1, 1, __pa(addr),
648 tce_table_size, 0x1000);
650 pe_err(pe, "Failed to configure 32-bit TCE table,"
655 /* Setup linux iommu table */
656 tbl = &pe->tce32_table;
657 pnv_pci_setup_iommu_table(tbl, addr, tce_table_size, 0);
659 /* OPAL variant of PHB3 invalidated TCEs */
660 swinvp = of_get_property(phb->hose->dn, "ibm,opal-tce-kill", NULL);
662 /* We need a couple more fields -- an address and a data
663 * to or. Since the bus is only printed out on table free
664 * errors, and on the first pass the data will be a relative
665 * bus number, print that out instead.
668 tbl->it_index = (unsigned long)ioremap(be64_to_cpup(swinvp), 8);
669 tbl->it_type = TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE;
671 iommu_init_table(tbl, phb->hose->node);
675 if (pe->tce32_seg >= 0)
678 __free_pages(tce_mem, get_order(tce_table_size));
681 static void pnv_ioda_setup_dma(struct pnv_phb *phb)
683 struct pci_controller *hose = phb->hose;
684 unsigned int residual, remaining, segs, tw, base;
685 struct pnv_ioda_pe *pe;
687 /* If we have more PE# than segments available, hand out one
688 * per PE until we run out and let the rest fail. If not,
689 * then we assign at least one segment per PE, plus more based
690 * on the amount of devices under that PE
692 if (phb->ioda.dma_pe_count > phb->ioda.tce32_count)
695 residual = phb->ioda.tce32_count -
696 phb->ioda.dma_pe_count;
698 pr_info("PCI: Domain %04x has %ld available 32-bit DMA segments\n",
699 hose->global_number, phb->ioda.tce32_count);
700 pr_info("PCI: %d PE# for a total weight of %d\n",
701 phb->ioda.dma_pe_count, phb->ioda.dma_weight);
703 /* Walk our PE list and configure their DMA segments, hand them
704 * out one base segment plus any residual segments based on
707 remaining = phb->ioda.tce32_count;
708 tw = phb->ioda.dma_weight;
710 list_for_each_entry(pe, &phb->ioda.pe_dma_list, dma_link) {
714 pe_warn(pe, "No DMA32 resources available\n");
719 segs += ((pe->dma_weight * residual) + (tw / 2)) / tw;
720 if (segs > remaining)
725 * For IODA2 compliant PHB3, we needn't care about the weight.
726 * The all available 32-bits DMA space will be assigned to
729 if (phb->type == PNV_PHB_IODA1) {
730 pe_info(pe, "DMA weight %d, assigned %d DMA32 segments\n",
731 pe->dma_weight, segs);
732 pnv_pci_ioda_setup_dma_pe(phb, pe, base, segs);
734 pe_info(pe, "Assign DMA32 space\n");
736 pnv_pci_ioda2_setup_dma_pe(phb, pe);
744 #ifdef CONFIG_PCI_MSI
745 static void pnv_ioda2_msi_eoi(struct irq_data *d)
747 unsigned int hw_irq = (unsigned int)irqd_to_hwirq(d);
748 struct irq_chip *chip = irq_data_get_irq_chip(d);
749 struct pnv_phb *phb = container_of(chip, struct pnv_phb,
753 rc = opal_pci_msi_eoi(phb->opal_id, hw_irq);
759 static int pnv_pci_ioda_msi_setup(struct pnv_phb *phb, struct pci_dev *dev,
760 unsigned int hwirq, unsigned int virq,
761 unsigned int is_64, struct msi_msg *msg)
763 struct pnv_ioda_pe *pe = pnv_ioda_get_pe(dev);
764 struct pci_dn *pdn = pci_get_pdn(dev);
765 struct irq_data *idata;
766 struct irq_chip *ichip;
767 unsigned int xive_num = hwirq - phb->msi_base;
769 uint32_t addr32, data;
772 /* No PE assigned ? bail out ... no MSI for you ! */
776 /* Check if we have an MVE */
777 if (pe->mve_number < 0)
780 /* Force 32-bit MSI on some broken devices */
781 if (pdn && pdn->force_32bit_msi)
784 /* Assign XIVE to PE */
785 rc = opal_pci_set_xive_pe(phb->opal_id, pe->pe_number, xive_num);
787 pr_warn("%s: OPAL error %d setting XIVE %d PE\n",
788 pci_name(dev), rc, xive_num);
793 rc = opal_get_msi_64(phb->opal_id, pe->mve_number, xive_num, 1,
796 pr_warn("%s: OPAL error %d getting 64-bit MSI data\n",
800 msg->address_hi = addr64 >> 32;
801 msg->address_lo = addr64 & 0xfffffffful;
803 rc = opal_get_msi_32(phb->opal_id, pe->mve_number, xive_num, 1,
806 pr_warn("%s: OPAL error %d getting 32-bit MSI data\n",
811 msg->address_lo = addr32;
816 * Change the IRQ chip for the MSI interrupts on PHB3.
817 * The corresponding IRQ chip should be populated for
820 if (phb->type == PNV_PHB_IODA2) {
821 if (!phb->ioda.irq_chip_init) {
822 idata = irq_get_irq_data(virq);
823 ichip = irq_data_get_irq_chip(idata);
824 phb->ioda.irq_chip_init = 1;
825 phb->ioda.irq_chip = *ichip;
826 phb->ioda.irq_chip.irq_eoi = pnv_ioda2_msi_eoi;
829 irq_set_chip(virq, &phb->ioda.irq_chip);
832 pr_devel("%s: %s-bit MSI on hwirq %x (xive #%d),"
833 " address=%x_%08x data=%x PE# %d\n",
834 pci_name(dev), is_64 ? "64" : "32", hwirq, xive_num,
835 msg->address_hi, msg->address_lo, data, pe->pe_number);
840 static void pnv_pci_init_ioda_msis(struct pnv_phb *phb)
843 const __be32 *prop = of_get_property(phb->hose->dn,
844 "ibm,opal-msi-ranges", NULL);
847 prop = of_get_property(phb->hose->dn, "msi-ranges", NULL);
852 phb->msi_base = be32_to_cpup(prop);
853 count = be32_to_cpup(prop + 1);
854 if (msi_bitmap_alloc(&phb->msi_bmp, count, phb->hose->dn)) {
855 pr_err("PCI %d: Failed to allocate MSI bitmap !\n",
856 phb->hose->global_number);
860 phb->msi_setup = pnv_pci_ioda_msi_setup;
861 phb->msi32_support = 1;
862 pr_info(" Allocated bitmap for %d MSIs (base IRQ 0x%x)\n",
863 count, phb->msi_base);
866 static void pnv_pci_init_ioda_msis(struct pnv_phb *phb) { }
867 #endif /* CONFIG_PCI_MSI */
870 * This function is supposed to be called on basis of PE from top
871 * to bottom style. So the the I/O or MMIO segment assigned to
872 * parent PE could be overrided by its child PEs if necessary.
874 static void pnv_ioda_setup_pe_seg(struct pci_controller *hose,
875 struct pnv_ioda_pe *pe)
877 struct pnv_phb *phb = hose->private_data;
878 struct pci_bus_region region;
879 struct resource *res;
884 * NOTE: We only care PCI bus based PE for now. For PCI
885 * device based PE, for example SRIOV sensitive VF should
886 * be figured out later.
888 BUG_ON(!(pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL)));
890 pci_bus_for_each_resource(pe->pbus, res, i) {
891 if (!res || !res->flags ||
892 res->start > res->end)
895 if (res->flags & IORESOURCE_IO) {
896 region.start = res->start - phb->ioda.io_pci_base;
897 region.end = res->end - phb->ioda.io_pci_base;
898 index = region.start / phb->ioda.io_segsize;
900 while (index < phb->ioda.total_pe &&
901 region.start <= region.end) {
902 phb->ioda.io_segmap[index] = pe->pe_number;
903 rc = opal_pci_map_pe_mmio_window(phb->opal_id,
904 pe->pe_number, OPAL_IO_WINDOW_TYPE, 0, index);
905 if (rc != OPAL_SUCCESS) {
906 pr_err("%s: OPAL error %d when mapping IO "
907 "segment #%d to PE#%d\n",
908 __func__, rc, index, pe->pe_number);
912 region.start += phb->ioda.io_segsize;
915 } else if (res->flags & IORESOURCE_MEM) {
916 /* WARNING: Assumes M32 is mem region 0 in PHB. We need to
917 * harden that algorithm when we start supporting M64
919 region.start = res->start -
920 hose->mem_offset[0] -
921 phb->ioda.m32_pci_base;
922 region.end = res->end -
923 hose->mem_offset[0] -
924 phb->ioda.m32_pci_base;
925 index = region.start / phb->ioda.m32_segsize;
927 while (index < phb->ioda.total_pe &&
928 region.start <= region.end) {
929 phb->ioda.m32_segmap[index] = pe->pe_number;
930 rc = opal_pci_map_pe_mmio_window(phb->opal_id,
931 pe->pe_number, OPAL_M32_WINDOW_TYPE, 0, index);
932 if (rc != OPAL_SUCCESS) {
933 pr_err("%s: OPAL error %d when mapping M32 "
934 "segment#%d to PE#%d",
935 __func__, rc, index, pe->pe_number);
939 region.start += phb->ioda.m32_segsize;
946 static void pnv_pci_ioda_setup_seg(void)
948 struct pci_controller *tmp, *hose;
950 struct pnv_ioda_pe *pe;
952 list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
953 phb = hose->private_data;
954 list_for_each_entry(pe, &phb->ioda.pe_list, list) {
955 pnv_ioda_setup_pe_seg(hose, pe);
960 static void pnv_pci_ioda_setup_DMA(void)
962 struct pci_controller *hose, *tmp;
965 list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
966 pnv_ioda_setup_dma(hose->private_data);
968 /* Mark the PHB initialization done */
969 phb = hose->private_data;
970 phb->initialized = 1;
974 static void pnv_pci_ioda_create_dbgfs(void)
976 #ifdef CONFIG_DEBUG_FS
977 struct pci_controller *hose, *tmp;
981 list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
982 phb = hose->private_data;
984 sprintf(name, "PCI%04x", hose->global_number);
985 phb->dbgfs = debugfs_create_dir(name, powerpc_debugfs_root);
987 pr_warning("%s: Error on creating debugfs on PHB#%x\n",
988 __func__, hose->global_number);
990 #endif /* CONFIG_DEBUG_FS */
993 static void pnv_pci_ioda_fixup(void)
995 pnv_pci_ioda_setup_PEs();
996 pnv_pci_ioda_setup_seg();
997 pnv_pci_ioda_setup_DMA();
999 pnv_pci_ioda_create_dbgfs();
1002 eeh_addr_cache_build();
1008 * Returns the alignment for I/O or memory windows for P2P
1009 * bridges. That actually depends on how PEs are segmented.
1010 * For now, we return I/O or M32 segment size for PE sensitive
1011 * P2P bridges. Otherwise, the default values (4KiB for I/O,
1012 * 1MiB for memory) will be returned.
1014 * The current PCI bus might be put into one PE, which was
1015 * create against the parent PCI bridge. For that case, we
1016 * needn't enlarge the alignment so that we can save some
1019 static resource_size_t pnv_pci_window_alignment(struct pci_bus *bus,
1022 struct pci_dev *bridge;
1023 struct pci_controller *hose = pci_bus_to_host(bus);
1024 struct pnv_phb *phb = hose->private_data;
1025 int num_pci_bridges = 0;
1029 if (pci_pcie_type(bridge) == PCI_EXP_TYPE_PCI_BRIDGE) {
1031 if (num_pci_bridges >= 2)
1035 bridge = bridge->bus->self;
1038 /* We need support prefetchable memory window later */
1039 if (type & IORESOURCE_MEM)
1040 return phb->ioda.m32_segsize;
1042 return phb->ioda.io_segsize;
1045 /* Prevent enabling devices for which we couldn't properly
1048 static int pnv_pci_enable_device_hook(struct pci_dev *dev)
1050 struct pci_controller *hose = pci_bus_to_host(dev->bus);
1051 struct pnv_phb *phb = hose->private_data;
1054 /* The function is probably called while the PEs have
1055 * not be created yet. For example, resource reassignment
1056 * during PCI probe period. We just skip the check if
1059 if (!phb->initialized)
1062 pdn = pci_get_pdn(dev);
1063 if (!pdn || pdn->pe_number == IODA_INVALID_PE)
1069 static u32 pnv_ioda_bdfn_to_pe(struct pnv_phb *phb, struct pci_bus *bus,
1072 return phb->ioda.pe_rmap[(bus->number << 8) | devfn];
1075 static void pnv_pci_ioda_shutdown(struct pnv_phb *phb)
1077 opal_pci_reset(phb->opal_id, OPAL_PCI_IODA_TABLE_RESET,
1081 void __init pnv_pci_init_ioda_phb(struct device_node *np,
1082 u64 hub_id, int ioda_type)
1084 struct pci_controller *hose;
1085 static int primary = 1;
1086 struct pnv_phb *phb;
1087 unsigned long size, m32map_off, iomap_off, pemap_off;
1094 pr_info(" Initializing IODA%d OPAL PHB %s\n", ioda_type, np->full_name);
1096 prop64 = of_get_property(np, "ibm,opal-phbid", NULL);
1098 pr_err(" Missing \"ibm,opal-phbid\" property !\n");
1101 phb_id = be64_to_cpup(prop64);
1102 pr_debug(" PHB-ID : 0x%016llx\n", phb_id);
1104 phb = alloc_bootmem(sizeof(struct pnv_phb));
1106 memset(phb, 0, sizeof(struct pnv_phb));
1107 phb->hose = hose = pcibios_alloc_controller(np);
1109 if (!phb || !phb->hose) {
1110 pr_err("PCI: Failed to allocate PCI controller for %s\n",
1115 spin_lock_init(&phb->lock);
1116 /* XXX Use device-tree */
1117 hose->first_busno = 0;
1118 hose->last_busno = 0xff;
1119 hose->private_data = phb;
1120 phb->hub_id = hub_id;
1121 phb->opal_id = phb_id;
1122 phb->type = ioda_type;
1124 /* Detect specific models for error handling */
1125 if (of_device_is_compatible(np, "ibm,p7ioc-pciex"))
1126 phb->model = PNV_PHB_MODEL_P7IOC;
1127 else if (of_device_is_compatible(np, "ibm,power8-pciex"))
1128 phb->model = PNV_PHB_MODEL_PHB3;
1130 phb->model = PNV_PHB_MODEL_UNKNOWN;
1132 /* Parse 32-bit and IO ranges (if any) */
1133 pci_process_bridge_OF_ranges(phb->hose, np, primary);
1137 phb->regs = of_iomap(np, 0);
1138 if (phb->regs == NULL)
1139 pr_err(" Failed to map registers !\n");
1141 /* Initialize more IODA stuff */
1142 prop32 = of_get_property(np, "ibm,opal-num-pes", NULL);
1144 phb->ioda.total_pe = 1;
1146 phb->ioda.total_pe = *prop32;
1148 phb->ioda.m32_size = resource_size(&hose->mem_resources[0]);
1149 /* FW Has already off top 64k of M32 space (MSI space) */
1150 phb->ioda.m32_size += 0x10000;
1152 phb->ioda.m32_segsize = phb->ioda.m32_size / phb->ioda.total_pe;
1153 phb->ioda.m32_pci_base = hose->mem_resources[0].start - hose->mem_offset[0];
1154 phb->ioda.io_size = hose->pci_io_size;
1155 phb->ioda.io_segsize = phb->ioda.io_size / phb->ioda.total_pe;
1156 phb->ioda.io_pci_base = 0; /* XXX calculate this ? */
1158 /* Allocate aux data & arrays
1160 * XXX TODO: Don't allocate io segmap on PHB3
1162 size = _ALIGN_UP(phb->ioda.total_pe / 8, sizeof(unsigned long));
1164 size += phb->ioda.total_pe * sizeof(phb->ioda.m32_segmap[0]);
1166 size += phb->ioda.total_pe * sizeof(phb->ioda.io_segmap[0]);
1168 size += phb->ioda.total_pe * sizeof(struct pnv_ioda_pe);
1169 aux = alloc_bootmem(size);
1170 memset(aux, 0, size);
1171 phb->ioda.pe_alloc = aux;
1172 phb->ioda.m32_segmap = aux + m32map_off;
1173 phb->ioda.io_segmap = aux + iomap_off;
1174 phb->ioda.pe_array = aux + pemap_off;
1175 set_bit(0, phb->ioda.pe_alloc);
1177 INIT_LIST_HEAD(&phb->ioda.pe_dma_list);
1178 INIT_LIST_HEAD(&phb->ioda.pe_list);
1180 /* Calculate how many 32-bit TCE segments we have */
1181 phb->ioda.tce32_count = phb->ioda.m32_pci_base >> 28;
1183 /* Clear unusable m64 */
1184 hose->mem_resources[1].flags = 0;
1185 hose->mem_resources[1].start = 0;
1186 hose->mem_resources[1].end = 0;
1187 hose->mem_resources[2].flags = 0;
1188 hose->mem_resources[2].start = 0;
1189 hose->mem_resources[2].end = 0;
1191 #if 0 /* We should really do that ... */
1192 rc = opal_pci_set_phb_mem_window(opal->phb_id,
1195 starting_real_address,
1196 starting_pci_address,
1200 pr_info(" %d PE's M32: 0x%x [segment=0x%x] IO: 0x%x [segment=0x%x]\n",
1202 phb->ioda.m32_size, phb->ioda.m32_segsize,
1203 phb->ioda.io_size, phb->ioda.io_segsize);
1205 phb->hose->ops = &pnv_pci_ops;
1207 phb->eeh_ops = &ioda_eeh_ops;
1210 /* Setup RID -> PE mapping function */
1211 phb->bdfn_to_pe = pnv_ioda_bdfn_to_pe;
1214 phb->dma_dev_setup = pnv_pci_ioda_dma_dev_setup;
1216 /* Setup shutdown function for kexec */
1217 phb->shutdown = pnv_pci_ioda_shutdown;
1219 /* Setup MSI support */
1220 pnv_pci_init_ioda_msis(phb);
1223 * We pass the PCI probe flag PCI_REASSIGN_ALL_RSRC here
1224 * to let the PCI core do resource assignment. It's supposed
1225 * that the PCI core will do correct I/O and MMIO alignment
1226 * for the P2P bridge bars so that each PCI bus (excluding
1227 * the child P2P bridges) can form individual PE.
1229 ppc_md.pcibios_fixup = pnv_pci_ioda_fixup;
1230 ppc_md.pcibios_enable_device_hook = pnv_pci_enable_device_hook;
1231 ppc_md.pcibios_window_alignment = pnv_pci_window_alignment;
1232 pci_add_flags(PCI_REASSIGN_ALL_RSRC);
1234 /* Reset IODA tables to a clean state */
1235 rc = opal_pci_reset(phb_id, OPAL_PCI_IODA_TABLE_RESET, OPAL_ASSERT_RESET);
1237 pr_warning(" OPAL Error %ld performing IODA table reset !\n", rc);
1240 * On IODA1 map everything to PE#0, on IODA2 we assume the IODA reset
1241 * has cleared the RTT which has the same effect
1243 if (ioda_type == PNV_PHB_IODA1)
1244 opal_pci_set_pe(phb_id, 0, 0, 7, 1, 1 , OPAL_MAP_PE);
1247 void pnv_pci_init_ioda2_phb(struct device_node *np)
1249 pnv_pci_init_ioda_phb(np, 0, PNV_PHB_IODA2);
1252 void __init pnv_pci_init_ioda_hub(struct device_node *np)
1254 struct device_node *phbn;
1258 pr_info("Probing IODA IO-Hub %s\n", np->full_name);
1260 prop64 = of_get_property(np, "ibm,opal-hubid", NULL);
1262 pr_err(" Missing \"ibm,opal-hubid\" property !\n");
1265 hub_id = be64_to_cpup(prop64);
1266 pr_devel(" HUB-ID : 0x%016llx\n", hub_id);
1268 /* Count child PHBs */
1269 for_each_child_of_node(np, phbn) {
1270 /* Look for IODA1 PHBs */
1271 if (of_device_is_compatible(phbn, "ibm,ioda-phb"))
1272 pnv_pci_init_ioda_phb(phbn, hub_id, PNV_PHB_IODA1);